want = -1
				case x > y:
					want = +1
				}
				if got != want {
					t.Errorf("(%g).Cmp(%g) = %v; want %v", x, y, got, want)
				}
			}
		}
	}
}

func BenchmarkFloatAdd(b *testing.B) {
	x := new(Float)
	y := new(Float)
	z := new(Float)

	for _, prec := range []uint{10, 1e2, 1e3, 1e4, 1e5} {
		x.SetPrec(prec).SetRat(NewRat(1, 3))